Sheet-folding mechanism



- April 24, i928.

H. M. BARBER SHEET FOLDING MECHANISM Filed April 2. .1927 2 Sheets-Sheet Jau.

ATTORNEYS April 24, 1928.

H. M, BARBER SHEET FOLDING MECHANIS M Filed April 2. 32927 2 Sheets-Sheet INVENTORl ATTORNEYS Patented Apr. 24, 1928.

n. massa, d F-yaweme'ck; Cammariere; Assfiva ci )i verraste .s

sons comme", or" waaraan?, Henneman; scenica-arida* nnfilwnna.

SHEET-romaine MEoHANIsM.

Application :nieut April 2, iz'nf seriai No. 18eme: i

In sheet folding' mechanismfwhere coact ingfloati'ng folding jaws and blades are used -to impart the fold to the sheet or group of sheets; it isVwel-l' known that as the' foldingv jaws' approach their folding point the centrifugal force' of the jaws tends to move the' roller ofV theirfloating` controllever away fromithe' inner wallv of its cam groove and against the outerl wall thereof, thereby causing; air uneven and noisy action of the parts and also undue wear thereon. These undesirable featuresj arey caused bythefact asthe faces of the folding jaws?y arebrought to theirradial positionf at their folding point, their" center of gravity will' bel back of the center' of their supporting bearings and as the` facesgof the jaws are brought' to their tangential positionI at their releasing: or de-` liver r point,' their center ofv gravity will be ahead of the center of their supporti-ng bearings.

Theobject of` my invention is toprovide meansV for ensuring the even and quiet action of the parts. with a minimum 'wearv thereof My invention, therefore,.comprises intermittently acting counter-balancing means `for `counteractingf the* centrifugal" force of the folding-jaws during a predetermined arc of the radial path of said jaws for ensuring the even and quiet action of the parts hereinabove referred to.

My invention more particularly comprises spring pressed yielding means arranged to act on the folding jaws to counteract their centrifugal force during that portion of their rotary travel in which they are oscillated to float them to and from their radial or folding position; by preventing the roller of the jawfloating control lever from being thrown outwardly away from the inner wall and against the outer wall of its cam groove during this portion of the rotary movement of the jaws.

` A practicaly embodiment of my invention is represented in the accompanying drawings. in which j F ig. 1 represents a cross section through the folding jaw carrier adjacent one end thcreof,-one pair of floating folding jaws being in the position they assume at the fold- -ing point. j

Fig. 2 represents a detail similar view on an enlarged scale,

looking in the direction' ofthe arrows.'

' Fig. 4 represents in elevation the lever for controlling the opening and closing ofthe foldingijaws. i 'l l Fig.. 5- represents a in thedirection ofthe arrows.

. s The floating folding jaws-.of eachpaii I denoted `by 1, Q, which jaws arev mounted to oscillate- `inthe' usualmanner` in* rslritablc bearing: supports 3,! fixedjto the. rotary` carL rier 43 which carrler inthe present instance is shown as' of `the .yoke type and as carrying.l

four pairs of folding jaws.

The jaw :floating control vided with the usual' roller 6l arranged to travelin the endless groovef ofthe'v stationary j boit` cam; 8y for oscillating the jawsi to' float-lthem intoandloutlvof their foldin posi` tion; This box cam groove 7-is so s aped'.` and the' floating folding jaws'are so mountedy that unless the v centr-ifiigail*forcef thef jaws is counteracted, the roller I6 will be forcedV n awayv from the'j inner wall and agaii'ishthe outer wall)` of the'icamjgroove 7w as; they jaws are brought toltheir ifoldngifposition," tn eie-Y by causing an uneven and .noisy action of thev represents a vdetailsection the plane i of the .linev rIII-III lof F ig?. 2,

y cross section takenin the plane; of the line V-V of Fig: 4 looking lever 5 isv proy als crank lever, the other arm 12 of said lever having its outer end positioned to engage an abutment 13 on the folding jaw `las the jaws are being floated into and out of their folding position. The tension of this spring 10 may be regulated to exert the required invention; hence, I do not. wish to he limited to the particular embodiment herein shownV and described, but A 1. In a sheet folding mechanism, floating foldingfjaws, and meansy forcoiinte'racting their centrifugal force during a predetermined arc of their rotary path.

2. In a sheet folding mechanism, Heating, folding jaws,

and yielding ,means for counteracting their centrifugal force during a' predetermined arc of their rotary path.

3. In asheet folding mechanism, floating. folding jaws, and counterbalancing meansv arranged to engage one of the jaws during a predetermined arc of their rotarj7 path to counteract their centrifugal force.

4C. In a sheet folding` mechanism, floating folding jaws, and yielding counterbalancing meansarranged to engage one of the vjaws during a predetermined arc of' their rotary path to counteract their centrifugal force.

5. In a sheet folding mechanism, a rotary carrier, floating foldingjaws mounted thereon, and a spring pressed bell crank lever mounted on the carrierand arranged to engage one of the'j aws during a predetermined arc of their rotary path to counteract their.

centrifugal force.

6. In a sheet folding mechanism, a sta-- tionary box cam, a rotary carrier, floating folding jaws mounted thereon, a jaw floating lever having a roller arranged to travel Vin the box cani groove, and means'on the rotary carrier arranged'to engage `one of the jaws y during its floating movement for f lever having a roller arranged to travel in the box Vcani groove, andyielding means on the rotary carrier arranged to engage' one of the jaws during its floating vmovement for counteracting the centrifugal action of the jaws and holding said rolleragainst the inner wall of its cani groove to ensure an evenand quiet action of the parts.

8. In a sheet folding mechanism, a sta-k tionary box cam, a rotary carrier, floating folding jaws mounted thereon, a jaw floating lever having a roller arranged to travel in the box cani groove, and a spring pressed bell crank lever on the rotary carrier arranged to engage one of the jaws-during its fioating ymovement for counteracting the cen,- trifugal action of the jaws and holding said roller against the inner wall of its cani groove to ensure an even and quiet action of the parts. f v

In testimonythat I claim the foregoing as my invention, I have signed my naine this 30th day 'of March, 1927.

f HOVARD M.-BARBER. 

